<template>
  <div class="list" ref="wrapper">
      <div>
            <div class="area">
            <div class="title border-topbottom">当前城市</div>
              <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">北京</div>
                </div>
            </div>
        </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                <div class="button-wrapper"
                 v-for="item of hot" 
                :key="item.id">
                    <div class="button">{{item.name}}</div>
                  </div>
              </div>
        </div>
            <div class="area" 
                 v-for="(item, key) of cities" 
                 :key="key"
                 :ref="key"
                 >
            <div class="title border-topbottom">{{key}}</div>
             <div class="item-list"> 
                <div 
                class="item border-bottom"
                v-for="innerItem of item"
                :key="innerItem.id"
                >
                    {{innerItem.name}}
              </div>
          </div>
        </div>
   </div>
  </div>
</template>

<script>
import Bscroll from "better-scroll";
export default {
  name: "CityList",
  props: {
    hot: Array,
    cities: Object,
    letter:String
  },
  mounted() {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollTOElement(element)
        // this.scroll.srollToElement(element)
      }
    }
  }
};
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl';

.border-topbottom {
  &:before {
    border-color: #ccc;
  }

  &:after {
    border-color: #ccc;
  }
}

.border-bottom {
  &:before {
    border-color: #ccc;
  }
}

.list {
  position: absolute;
  overflow: hidden;
  top: 1.58rem;
  left: 0;
  right: 0;
  bottom: 0;
}

.title {
  line-height: 0.44rem;
  background: #eee;
  padding-left: 0.2rem;
  color: #666;
  font-size: 0.26rem;
}

.button-list {
  overflow: hidden;
  padding: 0.1rem 0.6rem 0.1rem 0.1rem;
}

.button-wrapper {
  float: left;
  width: 33.33%;
}

.button {
  margin: 0.1rem;
  padding: 0.1rem 0;
  text-align: center;
  border: 0.02rem solid #ccc;
  border-radius: 0.06rem;
}

.item-list, .item {
  line-height: 0.76rem;
  color: #666;
  padding-left: 0.12rem;
}
</style>